Incubator.



J. 0. OLSON.

INCUBATOR. APPLICATION FILED NOV. 25, 1913.

1,1 19,630. Patented Dec. 1,1914.

Inventor 1 Dy r "7 I o Attorneys JOHN O. OLSON, 015 BED WING. MINNESOTA.

INCUBATOR.

Specification of Letters Patent.

Patented Dec. 1, 1914..

Original application filed March 27, 1912, Serial No. 686,607. Dividedand this application filed November To all whom it may concern:

Be it known that 1, JOHN 0. Olson, a citizen of the United States,residing at Red Wing, in the county of Goodhue and State of Minnesota,have invented a new and useful Incubator, of which the following is aspecification.

The device forming the subject matter of this application is a structurewhich has been divided out of my co-pending application, Serial No.686,607, filed lVIarch 27, 1912, which has since become Patent No.1,100,146, dated June 16, 1914, and purporting to Set forth sundryimprovements in an incubator.

The objects of the present invention are to provide an incubator inwhich the pipe which conducts the heated air into the incubator, isterminally connected with a vent pipe entering the incubator, theconstruction being such that when the heated air is finally dischargedinto the vent pipe, a draft will be created in the vent pipe, therebyfacilitating the ventilation of the incubator.

A further object of the invention is to provide novel means forconnecting the air supply pipe with the hot air delivery pipe, so thatthe moistened air, traversing the air pipe will be heated, prior toentering the incubator.

A furtherobject of the invention is to provide a construction in whichthe heated air,

having traversed the delivery pipe, will be re-heated to some degree,before entering the vent pipe, thereby facilitating the draft in thevent pipe.

With the foregoing and other objects in View, which will appear as thedescription proceeds, the invention resides in the combination andarrangement of parts and in the details of construction hereinafterdescribed and claimed, it. being understood that changes in the preciseembodiment of the invention herein disclosed can be made within thescope of what is claimed'without departing from the spirit of theinvention.

1 In the accompanying drawings :Figure 1 shows the invention in verticallongitudinal section, parts appearing in elevation; Fig. 2 is a topplan, the lid of the outer case being removed; Fig. 3 is a sectionaldetail of the moistening mechanism and attending parts; and Fig. 4 is afragmental vertical section showing the means whereby the sections ofthe pipes are assembled with the cases.

Serial No. 803,028.

In carrying out the invention there is provided an inner case 1, havingoutlets 2, securing a ventilation of the case. The case 1 is surroundedby an outer case 51. To one end 10 of the outer case 51 is secured ahood 3, within which is supported a water cup 4, in any desired'manner.In the present instance, the water cup 4: is upheld by an angle bracket5, adjustably secured to the end wall 10 of the case 51 by means of aclamp and slot connection 6, permitting a lowering of the bracket 5, sothat the cup 4 may be inserted into and be removed from the hood 3. Theupper end of the hood 3 is partially closed, and is entered by an airsupply pipe 7, provided with a damper 8. A tubular sleeve 9 is insertedthrough the end walls of the cases 1 and 51, theouter end of the sleeve9 being closed as shown at 11. The air supply pipe 7 enters one side ofthe sleeve 9.

Supported by a bracket 12 is a lamp 1 1, the chimney of which enters aheating drum, denoted generally by the numeral 15. The heating drum 15includes an'inner wall 16 and an outer wall'17, connected by a bottom 18in which there are air inlet openings 19. The upper end of the outerwall 17 is connected with the cylindrical portion 20 of the drum, thesame having a top 21, provided with a draft. outlet opening 22.

A hot air delivery pipe 23-enters one side of the cylindrical portion 20of the drum, and passes inwardly through the end wall 11 of the sleeve9, the end wall 11 preventing an indraft of air between the deliverypipe and the sleeve. The delivery pipe 23 extends along the longitudinalcenter of the easel, substantially the full length of the case, thepipe23 diverging, as shown at 24:, toform a pairof return bends 25. Thereturn bends 25 terminate in connections 26 which enter the deliverypipe 23, adjacent its initial end, as indicated at 27 Across theinterior of the portions 26 of the return bends, imperforate partitions28 extend, the partitions being located between the delivery pipe 23 andthe extremities 30 and 32 of the return bends 25. Thus there are formedin the portions 26 of the return bends, heating chambers 29 whichcommunicate with the delivery pipe 23 adjacent its initial end.

The portions 30 and 32 of the return bends enter an upright tapered bentpipe 31, the wider end of which is upwardly disposed, the narrower,lower end of the vent pipe entering the case 51 and communicat ing withthe space between the cases 51 and 1, as shown at 33.

Located within the case 1 is a thermostat 3e, operatively connected witha lever 35, fulcrumed intermediate its ends in the end wall of the innercase and extending through the end wall of the outer case. The outer endof the lever 35 is operatively united with a connection 36, connected atits upper end to the lever 37, supported upon a bracket 38, the free endof the lever 87 supporting a damper 10, positioned above the opening 22in the top of the drum 15.

In practical operation, the lamp 14 will heat the drum 15 and cause theair to be drawn inwardly and upwardly through the openings 19 in thebottom of the drum, the air being heated by contact with the outer faceof the inner wall 16. From the drum 15, the heated air will enter thedelivery pipe 23, and traverse the return bends 25 thereof, the heatedair passing into the extremities 30 and 32 of the return bends, and thusentering the vent pipe 31. The heated air entering the vent pipe 31 willtraverse the same, causing a draft in the vent pipe,

. and creating a suction through the portion 33 of the vent pipe,whereby the foul air between the cases 1 and 51 will be with drawn, theoutletsQ furnishing further communication with the interior of the case1.

As the air traverses the delivery pipe 23, the temperature within thechambers 29 will be raised, causing a heating of the partitions 28, andcausing a heating of the air which lies between the partitions and theportions 30 and 32 of the return bends. Therefore, the air as it passesfrom the return bends 25, into the portions 30 and 32 of the returnbends, will be heated to some extent, before it enters the vent pipe 31.Since the air is thus heated, prior to entering the vent pipe 31, thedraft through the vent pipe will be increased accordingly.

When the air within the case 1 is drawn outwardly through the openings 2and beneath the case 1 through the vent pipe 31, in the mannerhereinbei'ore described, fresh air will be drawn upwardly through thehood 3, about the water cup 4:, the entering air being thus moistened.The air entering the hood 3 will traverse the pipe supply 17, controlledby the damper 8, and enter the sleeve 9, the outer end of which isclosed. As the air enters the sleeve 9 it will come into contact withthe initial end of the delivery pipe 23 and be heated, a supply ofmoist, fresh, heated air thus passing into the casing 1, through theopen inner end of the sleeve 9.

The function of the thermostat 3 1 and the parts controlled thereby iscommon and well understood and needs no specific explanation.

Having thus described the invention, what is claimed is 1. In anincubator, a case; a delivery pipe entering the case and having a returnbend discharging outside of the case, the return bend having a branchentering the delivery pipe adjacent the initial end of the deliverypipe; and a partition extended across the branch between the deliverypipe and the outlet end of the return bend; and means for heating theinitial end of the delivery pipe.

2. In an incubator, a case; an upright vent pipe entering the case atits lower end; a delivery pipe entering the case and having a returnbend entering the vent pipe to create a draft in the vent pipe, therebyto facilitate the ventilation of the case; the return bend having abranch entering the delivery pipe; a partition in the branch, betweenthe delivery pipe and the outlet end of the bend; means for heating theinitial end of the delivery pipe; and means for supplying air to thecase.

3. In an incubator, a case; an upright vent pipe entering the case; adelivery pipe entering the case and having a return bend entering thevent pipe to create a draft in the vent pipe, thereby to facilitate theventilation of the case; means for heating the initial end of thedelivery pipe; the return bend having a branch entering the deliverypipe; and a partition in the branch, between the delivery pipe and thatportion of the bond which enters the vent pipe.

4. In an incubator, a case; a' delivery pipe entering the case andhaving a return bend discharging outside of the case, the return bendhaving a branch entering the delivery pipe; and a partition in thebranch, between the delivery pipe and the discharge end of the bend.

5. In an incubator, a case; a delivery pipe entering the case and havinga return bend discharging outside of the case; means for heating theinitial end of the delivery pipe; the return bend having a branchentering the delivery pipe adjacent the heating means; a partition inthe branch between the delivery pipe and the outlet end of the returnbend, the partition being located adjacent the heating means, thepartition dividing the branch into two chambers, one

of which communicates with the delivery pipe and the other of whichcommunicates with the return bend adjacent the outlet end of the returnbend, to effect a heating and an acceleration of the air, as the sameapproaches the outlet end of the return bend.

6. In an incubator, a case; an air supply pipe entering the case; amoistening device movable with respect to the mouth of the pipe toregulate the moistening of the air in the pipe; a damper operating inthe pipe In testimony that I claim the foregoing and controlling thepassage of air through as my own, I have hereto affixed my signathe pipeirrespective of the amount of moisture in the presence of two Witnesses.

ture in the air; and a heating means for the JOHN O. OLSON. 5 pipe", thepoint of application of the heating Witnesses:

means with respect to the pipe being spaced ALBERT MoHN,

remotely from the moistening device. W. O. HOFFLAND.

Copies of thin patent may be obtained for m cents each, by addressingthe Commissioner of Iatentz, wuhlngton, ID. 0.

